NCOS stands for Non-Commissioned Officers, who are enlisted members of the military that do not hold a commissioned rank. Some synonyms for NCOS include non-officers, enlisted personnel, sergeants, corporals, and privates. Non-officers refer to those who do not hold a commissioned rank and are typically responsible for carrying out specific duties within a military unit. Enlisted personnel covers all enlisted individuals, including those who hold NCOS ranks. Sergeants and corporals are specific ranks within the NCOS hierarchy, with sergeants typically overseeing a unit or platoon and corporals serving as a team leader. Privates are the lowest rank within the NCOS structure, responsible for carrying out basic duties and tasks.